Estimating the Completion Time of Crowdsourced Tasks using Survival Analysis Jing Wang, New York University Siamak Faridani, University of California,

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Presentation on theme: "Estimating the Completion Time of Crowdsourced Tasks using Survival Analysis Jing Wang, New York University Siamak Faridani, University of California,"— Presentation transcript:

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Estimating the Completion Time of Crowdsourced Tasks using Survival Analysis Jing Wang, New York University Siamak Faridani, University of California, Berkeley Panos Ipeirotis, New York Univesity 1

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2 Crowdsourcing: Pricing and Time to completion?  Many firms use crowdsourcing for a variety of tasks  Still unclear how to price  Prior results indicate that price does not affect quality (Mason and Watts, 2009)  …but it does affect completion time  Unclear how long it will take for a task to finish

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21 Conclusions  Completion times for tasks in Amazon Mechanical Turk follow a heavy tail distribution. (Paper studying MicroTasks.com has similar conclusions.)  Sample averages cannot be used to predict the expected completion time of a task.  By fitting a Cox proportional hazards regression model to the data collected from AMT, we showed the effect of various HIT parameters in the completion time of the task  “Base survival function” still a power-law  Still difficult to predict